Turntimber Ranger
The Ally tribe ran on a single arithmetic: the more Allies in play, the more each new one does, with the payoff usually landing as a one-time burst when the trigger resolves. This is the version that banks the burst into a board. Every Ally that enters forks the same trigger two ways: a 2/2 Wolf token, and a +1/+1 counter on the Ranger itself. The Wolf is the part that breaks the usual Ally math, because Wolves are not Allies, so the body count grows faster than the trigger condition feeding it. Sequence a handful of Allies and you have a wall of 2/2s with a steadily fattening Ranger anchoring them, all spun off a five-mana 2/2 that climbs out of removal range as it goes. The "may" clause is the part doing the quiet work: each trigger is optional, so you can decline the token when an extra body would walk you into something worse, and the Ranger never generates a trigger that hurts you. That makes the whole package pure upside layered onto Allies you were casting anyway. What lifts it past a stock tribal payoff is that it converts width into two different threats at once: a swarm of disposable tokens, and a single creature that keeps growing into a real clock. The counters won't save the Ranger from a destroy or exile sweeper, but against burn and shrinking effects, the accumulated size is exactly what keeps your anchor on the table.
